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Glass fiber-reinforced polypropylene resin composition formula and preparation method

A technology of polypropylene resin and glass fiber, which is applied in the formulation and preparation of plastic materials, can solve the problems of high cost and limitations, and achieve the effects of high impact performance, improved impact strength, and improved heat resistance

Inactive Publication Date: 2010-07-21
国家复合改性聚合物材料工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of grafts prepared by the solution method, although the grafting rate is high and the molecular weight is stable, the cost is high and its application is limited.

Method used

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  • Glass fiber-reinforced polypropylene resin composition formula and preparation method
  • Glass fiber-reinforced polypropylene resin composition formula and preparation method
  • Glass fiber-reinforced polypropylene resin composition formula and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 of the present invention: Calculated in parts by weight, 0.1 part of dicumyl peroxide (crosslinking agent is diacyl peroxide, sulfonyl peroxide, dihydrocarbon peroxydicarbonate, peroxy ester) , percarbonate esters, peroxyketals, dihydrocarbon peroxides, alkyl hydroperoxides, ketone peroxides or peracids, or a mixture of any two or more, the implementation of the present invention The example uses dicumyl peroxide as an example) and 0.5 parts of antioxidant 1010 are dispersed in 5 parts of phthalic acid type unsaturated polyester (the unsaturated resin used can be phthalic acid type unsaturated polyester ester, isophthalic acid type unsaturated polyester, bisphenol A type unsaturated polyester and vinyl ester type unsaturated polyester) to form solution A; solution A and 60 parts of homopolypropylene particles (The melt index of homopolypropylene at ASTMD1238, 230°C is 15g / min, and its tensile strength is greater than 20MPa) Mixed in a high-speed mixer for 3...

Embodiment 2

[0024] Embodiment 2 of the present invention: Calculated in parts by weight, disperse 0.01 part of di-tert-butyl peroxide and 0.1 part of antioxidant 1010 in 1 part of isophthalic acid type unsaturated polyester to form solution A; A and 50 parts of block copolymerized polypropylene particles (the melt index of block copolymerized polypropylene at ASTMD1238, 230°C is 1g / min, and its tensile strength is greater than 20MPa) were placed in a high mixer and mixed for 2 minutes to obtain a mixed material B; then the mixed material B is added to the hopper of a twin-screw extruder with a screw diameter of 40 mm, and 50 parts of alkali-free glass fibers with a diameter of 2 μm are added during the extrusion process (glass fibers are treated with a coupling agent to obtain continuous alkali-free glass fiber), the temperature of the screw inlet and outlet sections of the twin-screw extruder is 210°C, the temperature of the middle section is 230°C, and the screw speed is 320rpm. After th...

Embodiment 3

[0025] Embodiment 3 of the present invention: Calculated in parts by weight, a mixture of 0.2 parts of tert-butyl peroxyisopropyl carbonate and cyclohexanone peroxide and 1 part of antioxidant 1010 are dispersed in 10 parts of bisphenol A type unsaturated In polyester, solution A is formed; solution A is mixed with 45 parts of homopolypropylene particles and 45 parts of block copolymerized polypropylene particles (the melt index of homopolypropylene and block copolymerized polypropylene particles is equal to ASTMD1238, 230 °C is 30g / min, and its tensile strength is greater than 20MPa) placed in a high mixer and mixed for 3 minutes to obtain the mixed material B; Add 5 parts of alkali-free glass fibers with a diameter of 13 μm (the glass fibers are treated with a coupling agent to obtain continuous alkali-free glass fibers). 230°C, the screw speed is 320rpm, the extruded material is water-cooled and pelletized to obtain pellets C; the pellets C are added to the injection moldin...

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Abstract

The invention discloses a glass fiber-reinforced polypropylene resin composition formula and a preparation method, wherein the glass fiber-reinforced polypropylene resin composition formula comprises the following components by weight parts: 95-100 parts of mixtures of polypropylene and glass fiber, 1-10 parts of unsaturated resins, 0.01-0.2 part of cross-linking agent and 0.1-1 part of antioxidant. The preparation method uses unsaturated polyester as an interface compatilizer to prepare polypropylene graft which has the functions of crosslinking and coupling and can form a grafting monomer when melted with polypropylene to be extruded so that the surface activity of the polypropylene is enhanced, a reactive group at one end of the polypropylene and the surface of the glass fiber form an ionic bond, a long chain at the other end and the polypropylene generate strong tangling function so that the interface acting force is obviously improved, and then the polypropylene graft with high strength and good stability is obtained.

Description

technical field [0001] The invention relates to a formulation and a preparation method of a plastic material, in particular to a formulation and a preparation method of a glass fiber reinforced polypropylene resin composition. Background technique [0002] Since polypropylene resin (PP) exhibits excellent physical properties, chemical resistance, and processability, it has been widely used in automotive parts, home electronic appliances, and industrial materials. However, when making some engineering parts, its performance cannot meet the requirements. The existing technology generally improves the strength and rigidity of the material by adding glass fiber to the polypropylene resin. Since polypropylene is a non-polar resin, the interfacial bonding force between the glass fiber surface and polypropylene is weak, and the performance of glass fiber reinforced polypropylene composites mainly depends on the interfacial bonding force between polypropylene and glass fiber. When...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L67/06C08L53/00C08K7/14
Inventor 秦舒浩郭建兵张敏敏于杰罗恒罗筑
Owner 国家复合改性聚合物材料工程技术研究中心
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